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[FS] Victor JVC M-3030 Stereo Dual-Mono DC Power Amplifier

Discussion in 'classifieds' started by FLORIAN35, May 10, 2023.

  1. FLORIAN35

    FLORIAN35 pfm Member

    Victor JVC M-3030 stereo dual-mono direct coupled power amplifier very rare in UK. Price is £1050 ono, It is in fantastic condition and in full working order.It has been fully serviced(as per service manual,documentation provided) and ready to go for another 30 years or more,true dual mono construction with 2 massive encapsulated transformers.This was exclusively made for japanese market therefore you will simply have to use a step down transformer like https://airlinktransformers.com/category/japanese-voltage-converters .Can drive hungry speakers like Kef Reference series or Dynaudio without problems.
    https://www.ebay.co.uk/itm/38548224...d=link&campid=5338728743&toolid=20001&mkevt=1


    "I owned an M-3030 twice, and would purchase another one if I could find one. I have compared it to a number of amps including Krell KSA-80B, MDA-300's, and A FPB-700cx, as well as several Adcom's, and a few others. In the systems it was in, it clearly bested any of the Adcom units (some of which had been highly modified), and was not embarrassed by any of the Krell gear."Specifications


    Type Stereo power Amplifier Circuit System

    Signal circuit : Direct Coupling (ICL) cascode double differential common phase feedback input

    Parallel push-pull OCL Output

    Power Supply Circuit : Class A / Class B (for left and right only) Independent Power Supply Effective power

    (Both channel drive, 20 Hz to 20 kHz)130W + 130W (4 Ω)

    100W + 100W (8 Ω)Harmonic distortion factor (8 Ω, both channel drive)Effective Output : 0.02% or Less (20 Hz to 20 kHz), 0.005% or Less (1 kHz)

    At 50W output : 0.01% or less (20 Hz to 20 kHz)

    At 1W output : 0.01% or less (20 Hz to 20 kHz)

    Output terminal

    Speaker : 4 Ω ~ 16 ΩPower supply voltage

    100 VAC

    External dimensionsWidth 420x Height 166.5x Depth 300 mm

    Weight19.2kg


    In order to reduce dynamic interference distortion, the AB and LR independent power supply system is adopted, which is further developed from the A-class and B-class independent two power supply system adopted by VICTOR/JVC.

    Dynamic interference distortion occurs when the current consumption of the class B power amplifier stage (output stage) changes drastically according to the signal level change and interferes with the class A amplifier stage before the output stage where the voltage is amplified. To fundamentally solve this problem, in the class A and class B independent two power supply system, the power supply for the class A stage and the class B stage is separated from the transformer itself, and the power supply for the class A stage is made constant voltage. This prevents the voltage fluctuation of the class B stage from being directly transmitted to the class A stage, thus preventing dynamic interference distortion.

    The AB / LR power supply system adopted for the M-3030 has been developed to further reduce distortion by using the power supply for the B stage exclusively for the left and right channels.


    Twin monaural configuration is adopted to reduce static crosstalk such as jumping interference between board patterns and signal wires, potential difference between ground lines, jumping interference due to chassis structure, etc.

    An ICL (input, capacitor-less) circuit has been adopted in which the coupling and condenser of the input section are eliminated.


    Equipped with left and right independent level control.


    It is equipped with two input terminals, Direct and Subsonic.
     
    Blue Belle and Mike P like this.
  2. FLORIAN35

    FLORIAN35 pfm Member

    now £1000
     
  3. FLORIAN35

    FLORIAN35 pfm Member

    bump for this fantastic amp
     

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